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Full text of "Maps"

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Current s, 
Net: 16 ode 
%t end 1971: 2_odes, 
Communication Service 
ARimANET 
24 host computers, Lines-$50K/node/yr 
30 host computers, Lines-$40K/node/yr 
Response- .1 sec avg, line of text, any node to any node 
.'3 secavg, page of text (1000 characters) 
12 sec, photograph (1 M bits)(bulk_rate=80 KB) 
Capacity- IMP throughput capability = 750 kilobits/sec 
Current net permits 15KB/node average input rate 
Capacities from 2-(>0 KB can be designed for 
Reliability-Undetected bit error rate: 1012 (under 1 message/yr) 
Cost- 
BBN 
2. 
3. 
4. 
7. 
Service Uptime: 95% (Based on current IMP failure rate 8. 
from all causes of 2% and line failure rate of 2%) 9. 
10. 
11. 
$3-6K/mo for lines, leased IMPS' and maint. 12. 
ARPANET (1972)-$6K/mo (10 KB/n6de) 13. 
Low capacity, large net-$3K/mo (3KB/node) 14. 
Incremental cost for additional capacity: 30/megabit 15. 
Comparison: AUTODIN 2. 4KB termination-$11K/mo 
Resource Sharing 16. 
Protocol - System to system protocol standardized-Aug 1970 17. 
Network Control Program implementing above 18. 
complete as of Jul 71, at all nodes. ]Effort- 19. 
6-man- mo. /site 20. 
Higher level protocols for graphics, etc. being 21. 
'designed 22. 
Typical Uses - Direct use of locally unavailable hardware 23. 
- Reprogramming for new machine(avail. in net) 24. 
- Subroutine use of faster remote hardware(FFT) 25. 
HISTORY 
contract 
TEST N 
1/(>9 
UCLA 9/'69 
SRI 10/69 
UCSB 11/69 
Utah 12 / 6 9 
IPT NET 
BBN 4/70 
HIT 4/70 
Rand 5/70 
SDC 6/70 
Harvard (>/70 
Lincoln 7/70 
Stanford 7/70 
Carnegie 11/70 
Case 12/70 
Illinois 1 / 71 
Paoli 2/71 
USER TIPS 
NASA 8 / 71 
Mitre 9/71 
RADC* 10 / 71 
N BS::-' 11/71 
ETAC+ 12/7I 
USC 3/72 
TINKER+ 3/72 
McCLELLEN+ 3/72 
NCAR 3/72 
GWCT 3/72 
-Non duplicative access to large data base 
-Remote execution of software (send data) 
-Cooperative editing, library services 
- Conferencing, real time or not 
- Mail (10 times cheaper for letters) 
Development Level 
Communication System: Solid, current capability transferable. 
Computer-computer resource sharing: New protocol by 1972, then anyone can join. 
Multi-computer tasks: Problems like retrieval from widely distributed data bases 
will require many years of research. 
*Non-ARPA funded 
+AF funding in FY 73 
Program Funding-Prior - $5.3M, FY71 - $5.4M, FY72 - $7.(>M, FY 73 - $7.6M 
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